An urgent service call for an outdoor unit under heavy exposure
At AirGreen, we were recently called for an HVAC service call in Rivière-des-Prairies regarding a Lennox wall-mounted heat pump. The client, owner of a well-maintained duplex, contacted us after noticing a significant drop in the system’s performance, especially a strange noise coming from the outdoor unit along with a loss in heating efficiency.
Upon arrival, our technicians quickly located the wall-mounted unit, installed high up on a brick wall. Despite its sturdy design, the compressor seemed overworked, and several components showed visible signs of wear. A quick visual inspection confirmed the need for a thorough maintenance and a targeted repair of the Lennox wall-mounted heat pump.
Full inspection and fault diagnosis
Right from the first checks, we identified several concerning elements:
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Significant build-up of dust and debris inside the condenser.
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Slightly bent fan grille, affecting air circulation.
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Excessive vibration due to an unstable wall bracket.
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Oxidized electrical connectors, causing unstable motor operation.
These findings are typical of a unit exposed to weather without regular maintenance. The frequent freeze/thaw cycles in East Montréal – especially in Rivière-des-Prairies – place a heavy strain on outdoor units, particularly when installed without protective coverage.
Repairing the Lennox heat pump: a precise and methodical approach
We carried out a series of detailed technical interventions to restore proper operation of the unit:
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Complete cleaning of the condenser and fan, including removal of leaves, dust, and built-up dirt around the coils.
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Realignment of the protective grille to eliminate rubbing against the fan.
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Replacement of anti-vibration mounts on the wall bracket to eliminate noise and prevent mechanical wear.
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Cleaning and re-sealing of electrical connections, with application of an anti-corrosion treatment on terminals.
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Full heating cycle test, measuring output temperature to confirm optimal thermal performance.
The compressor, though worn, wasn’t yet critically damaged. However, we advised the client to consider annual preventive inspections to extend the life of the unit.
Client interaction: professionalism and education
The client, clearly concerned with the longevity of the system, asked us several thoughtful questions about maintenance and best practices. We took the time to explain:
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How to spot early signs of heat pump failure.
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The importance of cleaning indoor unit filters monthly.
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Why it’s crucial to have the outdoor unit professionally serviced at least once a year.
We also offered to include this home in our preventive maintenance program, which ensures a full yearly inspection at a preferred rate.
Final result: performance restored and a reassured client
By the end of our work, the Lennox heat pump was once again running quietly, stably, and efficiently. The warm air flow was in line with the technical specs, and noise levels had been cut in half after stabilizing the brackets. The client expressed strong satisfaction, praising the speed of our response (less than 24 hours after their call) and our HVAC professionalism.
What this repair shows about our HVAC expertise
This repair highlights several key aspects of our approach at AirGreen:
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Our fast response in East Montréal, especially in Rivière-des-Prairies.
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Our expertise with top brands like Lennox, known for high-performance systems that are sensitive to harsh weather conditions.
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Our technical precision, essential for working effectively on units installed at height or in complex configurations.
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Our commitment to building trust with every customer, offering practical advice and long-term solutions.
Practical tips for wall-mounted heat pump owners
What to watch for:
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Unusual metallic vibrations or noises.
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Sudden drop in heating or cooling.
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Water dripping down the exterior wall during winter.
Best practices:
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Clean the outdoor unit each spring.
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Check the condition of the wall bracket and tighten bolts if needed.
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Request a full inspection every 12 months, especially in exposed areas like Rivière-des-Prairies.
Why trust AirGreen
We specialize in heat pump repair, installation, and maintenance in Montréal, Laval, Longueuil, North Shore, and South Shore. Every service call is handled by certified technicians, focused on performance, safety, and energy efficiency of your HVAC systems. We prioritize a personalized approach, tailored to each home, setup, and brand.